How long does a patent last?

In Pennsylvania, the duration of a patent is usually 20 years from the date it was applied for. This 20-year period is measured from the earliest filing date that the patent application was first submitted. During this 20-year period, the patent owner has the right to stop others from making, using, selling, or importing the invention which is protected by the patent. Keep in mind, however, that despite the fact that a patent has a fixed 20-year legal duration, it does not mean that the patent will end up lasting for 20 years. In some cases, a patent may be deemed invalid before the 20-year period is up. In other cases, the patent may be extended if the patent owner can provide evidence that the invention is still providing some sort of competitive advantage. It’s important to note, too, that the time periods associated with a patent can be extended or shortened depending on various factors, such as the type of patent being filed and the country in which the patent is being applied. Therefore, it’s important to consult a qualified attorney if you have questions about the duration of a particular patent.

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